Favorite villian

I'm sure this has been discussed before, but being new, I'm throwing it out there. Who is your favorite villian - books, movies, tv, whatever? Book-wise, mine would be the husband from "Rose Madder." That guy is creepy as hell. Movie-wise, gotta be Maleficent.

This is a kind of harmless one (compared to other villains), but I liked Queen Narissa in Disney's "Enchanted". I'm not much of a fan of the more "realistic" villains; and Susan Serandon made a great (and humorous) evil queen.